Method of fur dyeing



Patented May 28, 1929.

UNITED STATES P TENT OFFICE;

wasnrz E. nonnmnrr mnrnrna' 1v. KORUKIN, OF NEW YORK, n. K, nssranons or ONE-HALF 'ro rnrnn r. vALn'rKO, OF NEW YORK, N. Y., AND rnonon 1a,. CHALOFF,

or BROOKLYN, NEW YORK.

METHOD or run Drums.

IO Drawing.

Our invention relates to methods of fur dyeing and has a particular reference to methods of dyeing by means of dry'or semidry dyes. 5 The furs are usually d'yed in vats or similar appliances by soaking them in dye solutions.

These methods are slow and expensive, re-

quiring considerable manualhandling of the we discovered that much better and more uniform results can be obtained by using certain grades of dyes or similar coloring matter in in a dry and finely powdered state. By rub bing the dry coloring matter mechanically against the fur a desired color or shade 1s imparted to the latter. We mix the colorlng matter with sawdust or similar material in order to separate the'particlesof the coloring matter and to prevent formation of lumps,

also to increase the rubbing action in the process of dyeing. A certain amount of moisture ordinarily contained in the sawdust causes a slight acid reaction, especially when metal salts are'used as colored matter, and this reaction tends to fix the colored matter on the bristles of the hair rendering same water prooi Aslight .alkali reaction with other kinlrllls of coloring matter produces the same res t.

type, such. as aroused in dyeing plants for mechanical agitation.

We found that, very satisfactory results .York and State of New York, June, 1928.

application filed May 24, 1932s. Serial no. 280,375.

is then added mixed with an ordinarysawdust. The amount of sawdust in relation to the amount of the coloring matter may vary and under ordinary conditions may be equal to it. The amount of this mixture in relation? to the available space in the drum may also vary, depending on the color and on the shade of it desired in the finished product.

The drum with the fur and the coloring mixture is then rotated in an ordinary manner, usually from one to three hours, depending on the depth of the color wanted. Wefound that by regulating the time of rotation it is possible to control the depthor shade of the color desired, longer rotation causing the .fur to receive deeper or darker coloring.

, Instead of rotating drumany other suitable methodmay be employed for agitating the furs in presence of the mixture of color ing matter with a suitable inert matter, preferabl'y of a fibrous structure, like sawdustfi Im rtant advantages of our invention are that t e"process of dyeing furs becomes very simple and inexpenswe, requiring much less time and labor than with ordinary methods of wet dyeing, ,alsothat .it is possible to accurately control the shade or colorof the finished product by controlling the time of such We claim as our invention: 1. A method of dyeing fur, comprising tumbling the fur with a mixture of. dry coloring matter and sawdust or the like until the desired color is imparted to the fur. 2. A method of dyeing fur, comprising agitating the fur with a mixture of dry colormg matter and sawdust or the like, and cOn-' trolling-the resultant color by the length of time of such agitation.

3. 'A method of dyeing fur, comprising treating the fur with a mixture of dry coloring matter and sawdust or the like.

Signed at New York in the county of. New

. WASILY ET BOLDIIREFF.

PETER N. KORUKIN. 

